smb4k 0.4 and other versions before 0.6.3 allows local users to read sensitive files via a symlink attack on the (1) smb4k.tmp or (2) sudoers temporary files.
http://www.securityfocus.com/bid/14756
http://www.mandriva.com/security/advisories?name=MDKSA-2005:157
http://www.gentoo.org/security/en/glsa/glsa-200511-15.xml